OK... I was thinking strictly in terms of close course racing. The 3.73s
would be a pretty drastic change and may reduce your top speed. There are
several free gear ratio calculators on the internet that will let you
compute theoretical top speeds for different ratios. These may help make a
decision for you.

If you follow boBs advice and go with a banjo style housing (and your racing
budget will allow it), changing ratios for sifferent tracks/events can go
pretty quick if you only need to swap out the pumpkin.